本题目来源于试卷: gc textbook chapter 8 Rotational Motion，类别为 unclassified
[问答题]
A shortstop may leap into the air i )jcl;9 fh53q1n okfcto cab6yi ws254jgz tch a ball and throw it quickly. As he throws the ball, the upper part of his body rotates. If you look quickly you will notice that his hips and legs rotate in the opposite direction (Fig. 8–354 zbg 2iw6sjy6). Explain.
参考答案:
The
shortstop, while in mid-air, cannot exert a torque on himself, and so his
angular momentum will be conserved while in the air. If the upper half of his body rotates in a
certain direction during the throwing motion, then to conserve angular
momentum, the lower half of his body will rotate in the opposite direction.
本题详细解析:
暂无
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Post time 2025-2-18 20:00:22